<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Multi-column Layout: parsing columns with invalid values</title>
<link rel="help" href="https://drafts.csswg.org/css-multicol/#propdef-columns">
<meta name="assert" content="columns supports only the grammar '<column-width> || <column-count>'.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
</head>
<body>
<script>
test_invalid_value("columns", "none");

test_invalid_value("columns", "10px 20px");
test_invalid_value("columns", "10 20");
</script>
</body>
</html>
